一种基于ECC的动态秘密共享方案  

Proactive Secret Sharing Scheme Based on ECC

作　　者：范畅[1] 茹鹏[1] 

机构地区：[1]电子科技大学成都学院,四川成都611731

出　　处：《计算机仿真》2012年第12期131-134,共4页Computer Simulation

摘　　要：许多秘密共享方案需要一个可信方参与,并完成掌管秘密及子密钥的产生、分发和验证工作,一旦可信方出现欺诈或故障,成员很难判断恢复秘密的真伪,既没有解决秘密更新和子密钥复用问题,更不具有秘密的动态更新和生命期特性。为此提出了基于椭圆曲线密码体制的秘密共享方案,具有分布式和动态特性,不需要第三可信方参与,并解决了秘密更新和子密钥复用问题;利用安全多方计算的仿真方法实现;经实验证明:动态方案在安全性方面有所提高,在效率方面可行,具有较高的理论创新和实践工程价值。Secret keepers have to face some tasks of key generation, distribution and verification in many of secret sharing schemes with trusted center. Members have difficulty in determining if the recovered secret is valid when the dealer cheats. Furthermore, those schemes are hard to achieve real proactive property. For the purpose of solving the problems, we proposed a distributed proactive secret sharing scheme based on elliptic curve cryptosystems without the trusted center. Anyone can check sub - shares provided by any members. The proactive property can be well implemented in solving secret updating and sub - shares reusing based on secure multi - party computation simulation method. Finally, the security and efficiency were analyzed in the paper. Experiments prove that： this scheme is of higher theoretical innovation and practical engineering value in terms of safety improvement, efficiency and feasible.

关 键 词：动态秘密共享 秘密生命期 椭圆曲线密码体制 分布式密钥生成 安全多方计算仿真 

分 类 号：TP393.08[自动化与计算机技术—计算机应用技术]